Calculate the force necessary to move a 1000 kg car from rest to 25 m/s in 125 m.
Options
A
312,500 N
B
2,500 N
C
5,000 N
D
1,250 N
Answer & Analysis
Answer
B
Analysis
To find the force necessary to move the
car, we can use the work-energy theorem, which states that the work done on an
object is equal to the change in its kinetic energy:
Since the car starts from rest, the initial
kinetic energy , and the final kinetic energy is given
by:
Calculate the final kinetic energy
Given:
,
,
Want More Practice Questions?
Access thousands of practice questions with detailed explanations on Scholardog.